Rivet Gun Set Heavy-duty Manual Rivet Gun Inch Automatic Rivet Tool, with 4 Sizes of Rivet Head One-hand Rivet Tool Four-Sizes Rivet Heads : 4 interchangeable rivet heads 3/32"(2.4mm), 1/8" (3.2mm), 5/32"(4mm), and 3/16"(4.8mm) are stored on handle. With pop rivet gun you are able to use 4 sizes of rivets for riveting.(There are only 4 styles A and D) Labour Saving : Rotating the adjustment sleeve, the grip distance of the rivet gun will be adjusted.The shorter the distance, the less force it takes to squeeze the riveter. With this labour-saving design, you can complete riveting smoothly regardless of your strength. Durable & Solid : The rivet gun with a high-strength aluminum body and reinforced carbon steel heat treatment handle, which provides high strength and long service life. Comfortable : The rivet gun is ergonomically designed. High-quality PVC-covered grip can anti-slip and provide users with comfort. Your hands will not suffer during riveting. Wide Application : With rivet gun you can handle three types of rivets: aluminum, steel, and stainless steel rivets. Whether you want to do construction, repair or craft making, you should not miss it.